Agree with the advice on the PPL confuser. I must admit, myself I didn't find Airlaw too bad but then I spent plenty of time browsing the book (Book 2, Jeremy Pratt) before taking the exam. It was my first topic I covered so I made sure I knew it thoroughly as I didn't want to chance failure on my first PPL related test.
Holloway, in what area (if any particular area) did you fall down? I found the worst bits were those which required you to remember numerical data as you cannot easily solve them with common sense if you don't know the answer from memory. The bits on VMC criteria versus VFR spring to mind
Good luck mate,
Fujiflyer